C++ nsCOMPtr::Close方法代码示例

// when this is called the browser side wants no more part of it
nsresult
nsWebSocketEstablishedConnection::Close()
{
  NS_ABORT_IF_FALSE(NS_IsMainThread(), "Not running on main thread");
  if (!mOwner)
    return NS_OK;

  // Disconnect() can release this object, so we keep a
  // reference until the end of the method
  nsRefPtr<nsWebSocketEstablishedConnection> kungfuDeathGrip = this;

  if (mOwner->mReadyState == nsIMozWebSocket::CONNECTING) {
    mOwner->SetReadyState(nsIMozWebSocket::CLOSED);
    mWebSocketChannel->Close(mOwner->mClientReasonCode,
                             mOwner->mClientReason);
    Disconnect();
    return NS_OK;
  }

  mOwner->SetReadyState(nsIMozWebSocket::CLOSING);

  if (mStatus == CONN_CLOSED) {
    mOwner->SetReadyState(nsIMozWebSocket::CLOSED);
    Disconnect();
    return NS_OK;
  }

  return mWebSocketChannel->Close(mOwner->mClientReasonCode,
                                  mOwner->mClientReason);
}

void
ServeResourceEvent::Shutdown()
{
  // Cleanup resources and exit.
  mInput->Close();
  mOutput->Close();

  // To shutdown the current thread we need to first exit this event.
  // The Shutdown event below is posted to the main thread to do this.
  nsCOMPtr<nsIRunnable> event = new ShutdownThreadEvent(NS_GetCurrentThread());
  NS_DispatchToMainThread(event);
}

NS_IMETHODIMP
nsJARInputThunk::Close()
{
    nsresult rv = NS_OK;

    if (mJarStream)
        rv = mJarStream->Close();

    if (!mUsingJarCache && mJarReader)
        mJarReader->Close();

    mJarReader = nullptr;

    return rv;
}

NS_IMETHODIMP
nsJARInputThunk::Close()
{
    if (mJarStream)
        return mJarStream->Close();

    return NS_OK;
}

NS_IMETHODIMP
nsMsgSaveAsListener::OnStopRequest(nsIRequest *request, nsISupports * aCtxt, nsresult aStatus)
{
  if (m_outputStream)
  {
    m_outputStream->Flush();
    m_outputStream->Close();
  }
  return NS_OK;
} 

NS_IMETHODIMP
nsOutputStreamTransport::Close()
{
    if (mCloseWhenDone)
        mSink->Close();

    // make additional writes return early...
    mOffset = mLimit = 0;
    return NS_OK;
}

void
nsFileCopyEvent::DoCopy()
{
  // We'll copy in chunks this large by default.  This size affects how
  // frequently we'll check for interrupts.
  const int32_t chunk = nsIOService::gDefaultSegmentSize * nsIOService::gDefaultSegmentCount;

  nsresult rv = NS_OK;

  int64_t len = mLen, progress = 0;
  while (len) {
    // If we've been interrupted, then stop copying.
    rv = mInterruptStatus;
    if (NS_FAILED(rv))
      break;

    int32_t num = std::min((int32_t) len, chunk);

    uint32_t result;
    rv = mSource->ReadSegments(NS_CopySegmentToStream, mDest, num, &result);
    if (NS_FAILED(rv))
      break;
    if (result != (uint32_t) num) {
      rv = NS_ERROR_FILE_DISK_FULL;  // stopped prematurely (out of disk space)
      break;
    }

    // Dispatch progress notification
    if (mSink) {
      progress += num;
      mSink->OnTransportStatus(nullptr, NS_NET_STATUS_WRITING, progress,
                               mLen);
    }
                               
    len -= num;
  }

  if (NS_FAILED(rv))
    mStatus = rv;

  // Close the output stream before notifying our callback so that others may
  // freely "play" with the file.
  mDest->Close();

  // Notify completion
  if (mCallback) {
    mCallbackTarget->Dispatch(mCallback, NS_DISPATCH_NORMAL);

    // Release the callback on the target thread to avoid destroying stuff on
    // the wrong thread.
    nsIRunnable *doomed = nullptr;
    mCallback.swap(doomed);
    NS_ProxyRelease(mCallbackTarget, doomed);
  }
}

NS_IMETHODIMP
nsInputStreamTee::Close()
{
  if (NS_WARN_IF(!mSource)) {
    return NS_ERROR_NOT_INITIALIZED;
  }
  nsresult rv = mSource->Close();
  mSource = 0;
  mSink = 0;
  return rv;
}

NS_IMETHODIMP
nsGopherContentStream::CloseWithStatus(nsresult status)
{
    if (mSocket) {
        mSocket->Close(status);
        mSocket = nsnull;
        mSocketInput = nsnull;
        mSocketOutput = nsnull;
    }
    return nsBaseContentStream::CloseWithStatus(status);
}

void
Logger::CloseFile()
{
  AssertRunningOnLoggerThread();
  MOZ_ASSERT(mLogFile);
  if (!mLogFile) {
    return;
  }
  Flush();
  mLogFile->Close();
  mLogFile = nullptr;
}

  NS_IMETHOD
  Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData) override
  {
    MOZ_ASSERT(NS_IsMainThread());
    MOZ_DIAGNOSTIC_ASSERT(strcmp(aTopic, DOM_WINDOW_DESTROYED_TOPIC) == 0);

    if (!mStream) {
      return NS_OK;
    }

    nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(mGlobal);
    if (!SameCOMIdentity(aSubject, window)) {
      return NS_OK;
    }

    // mStream->Close() will call JSStreamConsumer::OnInputStreamReady which may
    // then destory itself, dropping the last reference to 'this'.
    RefPtr<WindowStreamOwner> keepAlive(this);

    mStream->Close();
    mStream = nullptr;
    mGlobal = nullptr;
    return NS_OK;
  }

// nsIInputStream
NS_IMETHODIMP nsMIMEInputStream::Close(void) { INITSTREAMS; return mStream->Close(); }

 NS_IMETHOD
 Close() override
 {
   return mStream->Close();
 }